201-33-5305 A by Md: Abu Nasim Tanvir - Tuesday, 3 August 2021, 12:19 AM Number of replies: 0 The full form of FM and PM.Frequency modulation: The frequency of carrier wave is varied in proportion to the modulating signal waveform.Phase modulation: The phase of carrier wave is varied in proportion to the modulating signal waveform. Permalink